An industrial machine tools manufacturer buys parts from a supplier. For a particular part, the monthly demand is expected to average $750$ units. Ordering is done by phone and is estimated to cost $$50,$ including the cost of a quick parts inventory and payment. The company has determined that its inventory carrying costs are $25\%$ per year. The product is valued at the suppliers facility at $$35$ each. They charge $$3$ per part to have them shipped to the manufacturer$$s facility.